Rolling your own is the only way. As someone with way more money than time, I pick my battles on what to do myself and what to outsource. Wheel building is definitely DIY. Use not of the on-line spoke length calculators. Find or order spokes of the correct length (time and again, JRH has been an excellent source). Sit back and do the build, with the Internet/youTube and maybe an existing example wheel as your guide.
No need for a truing stand, use your dropouts. The quiet, repetitive process of assessing, truing and tensioning is a zenlike experience. It's something to be enjoyed. A $5 spoke wrench and a flat head screwdriver is the only tools you need. I dip each spoke into automotive anti-sieze compound for long term weather protection, but there are many suggestions out there how-to.
I'm glad it was hard to find someone willing to lace a NuVinci into a 406mm rim, it was the start of a great experience.
1st build: Dahon Jetstream folding bike
. Quick, reliable, capable of 30mph. Light enough to lift, folds for easy transport by car/bus/train.2nd build: RC powered 2009 Norco A-Line
. Top speed 31mph. Built like a tank, it's resistant to Boston potholes, can stop on a dime, easily goes up/down curbs when necessary.3rd build (just started): Scratch build
ultimate utility bike.